CVE-2026-59638

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.21% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 11.1% of scored records. A rank, not a probability.

NVD base score

9.3 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Amber

NVD analysis status

Analyzed. NVD last modified this record on 2026-08-28.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-08-03 00:57Z1 MO AGO

Last updated

2026-08-03 13:23Z1 MO AGO

Reserved

2026-07-06

Assigning CNA

bcorg

Record state

PUBLISHED

Severity

Critical (CVSS 9.3)

CNA CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/U:Amber

Weaknesses

• CWE-297Improper Validation of Certificate with Host MismatchVariant

Data version

5.2

Document digest

30083ba63a5870de4538b72210e77e3971d8bc66cd417b5771de7728fd1000c4

• github.comhttps://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%9059638vendor-advisory
• github.comhttps://github.com/bcgit/bc-java/commit/799bd15320a6310a447863638aa3df64acef829bpatch
• github.comhttps://github.com/bcgit/bc-java/commit/5ac55351cd1a8a7184d41c96a7ee87df0770240apatch